import { MachineStatus } from "../types/machine";

/**
 * Machine state categories for safety logic
 */
export const MachineStateCategory = {
  IDLE: "idle",
  ACTIVE: "active",
  WAITING: "waiting",
  COMPLETE: "complete",
  INTERRUPTED: "interrupted",
  ERROR: "error",
} as const;

export type MachineStateCategoryType =
  (typeof MachineStateCategory)[keyof typeof MachineStateCategory];

/**
 * Categorize a machine status into a semantic safety category
 */
export function getMachineStateCategory(
  status: MachineStatus,
): MachineStateCategoryType {
  switch (status) {
    // IDLE states - safe to perform any action
    case MachineStatus.IDLE:
    case MachineStatus.SEWING_WAIT:
    case MachineStatus.Initial:
    case MachineStatus.LowerThread:
      return MachineStateCategory.IDLE;

    // ACTIVE states - operation in progress, dangerous to interrupt
    case MachineStatus.SEWING:
    case MachineStatus.MASK_TRACING:
    case MachineStatus.SEWING_DATA_RECEIVE:
    case MachineStatus.HOOP_AVOIDANCEING:
      return MachineStateCategory.ACTIVE;

    // WAITING states - waiting for user/machine action
    case MachineStatus.COLOR_CHANGE_WAIT:
    case MachineStatus.MASK_TRACE_LOCK_WAIT:
    case MachineStatus.HOOP_AVOIDANCE:
      return MachineStateCategory.WAITING;

    // COMPLETE states - operation finished
    case MachineStatus.SEWING_COMPLETE:
    case MachineStatus.MASK_TRACE_COMPLETE:
    case MachineStatus.RL_RECEIVED:
      return MachineStateCategory.COMPLETE;

    // INTERRUPTED states - operation paused/stopped
    case MachineStatus.PAUSE:
    case MachineStatus.STOP:
    case MachineStatus.SEWING_INTERRUPTION:
      return MachineStateCategory.INTERRUPTED;

    // ERROR/UNKNOWN states
    case MachineStatus.None:
    case MachineStatus.TryConnecting:
    case MachineStatus.RL_RECEIVING:
    default:
      return MachineStateCategory.ERROR;
  }
}

/**
 * Determines if the pattern can be safely deleted in the current state.
 * Prevents deletion during active operations (SEWING, MASK_TRACING, etc.)
 */
export function canDeletePattern(status: MachineStatus): boolean {
  const category = getMachineStateCategory(status);
  // Can delete in IDLE, WAITING, or COMPLETE states, never during ACTIVE operations
  return (
    category === MachineStateCategory.IDLE ||
    category === MachineStateCategory.WAITING ||
    category === MachineStateCategory.COMPLETE
  );
}

/**
 * Determines if a pattern can be safely uploaded in the current state.
 * Only allow uploads when machine is idle or in a complete state.
 */
export function canUploadPattern(status: MachineStatus): boolean {
  const category = getMachineStateCategory(status);
  // Can upload in IDLE or COMPLETE states (includes MASK_TRACE_COMPLETE)
  return (
    category === MachineStateCategory.IDLE ||
    category === MachineStateCategory.COMPLETE
  );
}

/**
 * Determines if sewing can be started in the current state.
 * Allows starting from ready state or resuming from interrupted states.
 */
export function canStartSewing(status: MachineStatus): boolean {
  // Only in specific ready states
  return (
    status === MachineStatus.SEWING_WAIT ||
    status === MachineStatus.MASK_TRACE_COMPLETE ||
    status === MachineStatus.PAUSE ||
    status === MachineStatus.STOP ||
    status === MachineStatus.SEWING_INTERRUPTION
  );
}

/**
 * Determines if mask trace can be started in the current state.
 */
export function canStartMaskTrace(status: MachineStatus): boolean {
  // Can start mask trace when IDLE (after upload), SEWING_WAIT, or after previous trace
  return (
    status === MachineStatus.IDLE ||
    status === MachineStatus.SEWING_WAIT ||
    status === MachineStatus.MASK_TRACE_COMPLETE
  );
}

/**
 * Determines if sewing can be resumed in the current state.
 * Only for interrupted operations (PAUSE, STOP, SEWING_INTERRUPTION).
 */
export function canResumeSewing(status: MachineStatus): boolean {
  // Only in interrupted states
  const category = getMachineStateCategory(status);
  return category === MachineStateCategory.INTERRUPTED;
}

/**
 * Determines if disconnect should show a confirmation dialog.
 * Confirms if disconnecting during active operation or while waiting.
 */
export function shouldConfirmDisconnect(status: MachineStatus): boolean {
  const category = getMachineStateCategory(status);
  // Confirm if disconnecting during active operation or waiting for action
  return (
    category === MachineStateCategory.ACTIVE ||
    category === MachineStateCategory.WAITING
  );
}

/**
 * Visual information for a machine state
 */
export interface StateVisualInfo {
  color: string;
  iconName:
    | "ready"
    | "active"
    | "waiting"
    | "complete"
    | "interrupted"
    | "error";
  label: string;
  description: string;
}

/**
 * Get visual styling information for a machine state.
 * Returns color, icon, label, and description for UI display.
 */
export function getStateVisualInfo(status: MachineStatus): StateVisualInfo {
  const category = getMachineStateCategory(status);

  // Map state category to visual properties
  const visualMap: Record<MachineStateCategoryType, StateVisualInfo> = {
    [MachineStateCategory.IDLE]: {
      color: "info",
      iconName: "ready",
      label: "Ready",
      description: "Machine is idle and ready for operations",
    },
    [MachineStateCategory.ACTIVE]: {
      color: "warning",
      iconName: "active",
      label: "Active",
      description: "Operation in progress - do not interrupt",
    },
    [MachineStateCategory.WAITING]: {
      color: "warning",
      iconName: "waiting",
      label: "Waiting",
      description: "Waiting for user or machine action",
    },
    [MachineStateCategory.COMPLETE]: {
      color: "success",
      iconName: "complete",
      label: "Complete",
      description: "Operation completed successfully",
    },
    [MachineStateCategory.INTERRUPTED]: {
      color: "danger",
      iconName: "interrupted",
      label: "Interrupted",
      description: "Operation paused or stopped",
    },
    [MachineStateCategory.ERROR]: {
      color: "danger",
      iconName: "error",
      label: "Error",
      description: "Machine in error or unknown state",
    },
  };

  return visualMap[category];
}

/**
 * Map machine state category to status indicator state.
 * Returns the appropriate state for the StatusIndicator component.
 */
export function getStatusIndicatorState(
  status: MachineStatus,
): "active" | "down" | "fixing" | "idle" {
  const category = getMachineStateCategory(status);

  switch (category) {
    case MachineStateCategory.IDLE:
      return "active"; // Gray, no animation
    case MachineStateCategory.ACTIVE:
      return "active"; // Green with animation
    case MachineStateCategory.WAITING:
      return "fixing"; // Yellow with animation
    case MachineStateCategory.COMPLETE:
      return "active"; // Green with animation
    case MachineStateCategory.INTERRUPTED:
      return "down"; // Red with animation
    case MachineStateCategory.ERROR:
      return "down"; // Red with animation
    default:
      return "idle";
  }
}